Decker is going to be a prominent part of the Jets’ offense – the biggest issue with their team. But Vick might end up backing up Geno Smith, unless Smith struggles as badly as he did at times last season, when he was a rookie.

Johnson, unquestionably, will play a major role for the Jets, with his speed perhaps complementing the power of running back Chris Ivory.

But will he be able to offer the explosive playmaking ability that he showcased earlier in his career? And if so, how often? The Jets’ offense badly needs a player (or two or three) with breakaway speed, and the ability to gain large chunks of yardage on one play.

Last year, the Jets ranked 28th in the league with 5 yards per play. In 2012, they were 31st (4.6). In 2011, they ranked 27th (4.8). It should come as no surprise that the Jets missed the playoffs in all three seasons.

While assessing whether Johnson still is a big-play threat, let’s examine where he has ranked in the NFL in yards per carry and long runs during his six-year career.

2008

Yards per carry: 4.9 (4th)

Runs of 20-plus yards: 9 (7th)

Runs of 40-plus yards: 3 (4th)

2009

Yards per carry: 5.6 (3rd)

Runs of 20-plus yards: 22 (1st)

Runs of 40-plus yards: 7 (1st)

(Nobody else in the NFL had more than 12 runs of 20-plus yards in 2009.)

2010

Yards per carry: 4.3 (19th)

Runs of 20-plus yards: 13 (2nd)

Runs of 40-plus yards: 4 (2nd)

2011

Yards per carry: 4.0 (38th)

Runs of 20-plus yards: 11 (3rd)

Runs of 40-plus yards: 1 (19th)

2012

Yards per carry: 4.5 (13th)

Runs of 20-plus yards: 8 (9th)

Runs of 40-plus yards: 3 (5th)

2013

Yards per carry: 3.9 (30th)

Runs of 20-plus yards: 5 (17th)

Runs of 40-plus yards: 0

Consider that since Johnson entered the league, just one other player has produced 20-plus carries that gained at least 20 yards in a single season. In 2008, Adrian Peterson had 20 runs of 20-plus yards. In 2009, Johnson had 22 such runs. In 2012, Peterson had 27.

To be fair, Johnson was limited by a torn meniscus in his knee last season – an injury he played through, and one that required surgery in January. So that was a mitigating factor in his numbers being a far cry from what they were earlier in his career.

If he is not exactly like his 2009 self anymore – and the Jets reportedly are not paying him like he is, with a two-year contract that averages $4 million a year – then how much does he still resemble the big-play running back who wowed the NFL not long ago?